Modern Seventh Generation Elantra Fault Code P0638:00

P0638 fault code Chinese meaning: throttle actuator control range/performance (line 65438 +0) Category: computer or auxiliary output circuit. You have to go to the repair shop to get rid of this, so don't take it apart easily.

Detailed meaning: In the Electronic Throttle Control (ETC) system, the function of the accelerator pedal position (APP) sensor is to transmit the position of the accelerator pedal to the throttle control module in the form of an electrical signal, which serves as a reference for the throttle actuator to control the throttle opening. The throttle actuator is a stepping motor, which is responsible for controlling the throttle opening according to the instruction of the throttle control module. This fault code will appear if the electronic control unit (ECU) detects an error in the throttle actuator control circuit. The fault causes include the fault of the throttle position (TP) sensor, the fault of the throttle control module, the fault of the accelerator pedal module and the fault of the electronic control module (PCM or ECM).